OSPFv3

OSPFv3 is the IPv6-capable version of OSPF that provides link-state routing for IPv6 networks, supporting VRF-aware multi-instance deployments with per-VRF router ID, BFD, and area-based hierarchical design on NX-OS. It includes configurable area types (stub, NSSA) with translator role control, address-family-specific settings for IPv6 unicast including administrative distance, default metric, and ECMP path limits. OSPFv3 interface-level configuration controls process association, area membership, cost, network type, priority, and passive interface behavior across loopback, VLAN, Ethernet, and port-channel interfaces.

Diagram

Classes

routing (nxos.devices.configuration)

Name	Type	Constraint	Mandatory	Default Value
ospfv3_processes	List	`[ospfv3_processes]`	No

loopbacks (nxos.devices.configuration.interfaces)

Name	Type	Constraint	Mandatory	Default Value
ospfv3	Class	`[ospfv3]`	No

vlans (nxos.devices.configuration.interfaces)

Name	Type	Constraint	Mandatory	Default Value
ospfv3	Class	`[ospfv3]`	No

ethernets (nxos.devices.configuration.interfaces)

Name	Type	Constraint	Mandatory	Default Value
ospfv3	Class	`[ospfv3]`	No

port_channels (nxos.devices.configuration.interfaces)

Name	Type	Constraint	Mandatory	Default Value
ospfv3	Class	`[ospfv3]`	No

ospfv3_processes (nxos.devices.configuration.routing)

Name	Type	Constraint	Mandatory
name	String		Yes
flush_routes	Boolean	`true`, `false`	No
isolate	Boolean	`true`, `false`	No
shutdown	Boolean	`true`, `false`	No
auto_cost_reference_bandwidth	Integer	min: `0`, max: `4294967295`	No
auto_cost_reference_bandwidth_unit	Choice	`mbps`, `gbps`	No
router_id	String		No
bfd	Boolean	`true`, `false`	No
log_adjacency_changes	Choice	`none`, `brief`, `detail`	No
discard_route_external	Boolean	`true`, `false`	No
discard_route_internal	Boolean	`true`, `false`	No
name_lookup	Boolean	`true`, `false`	No
passive_interface_default	Boolean	`true`, `false`	No
areas	List	`[areas]`	No
address_families	List	`[address_families]`	No
vrfs	List	`[vrfs]`	No

ospfv3 (nxos.devices.configuration.interfaces.loopbacks)

Name	Type	Constraint	Mandatory
process	String		Yes
advertise_secondaries	Boolean	`true`, `false`	No
area	String		No
bfd	Boolean	`true`, `false`	No
cost	Integer	min: `0`, max: `65535`	No
dead_interval	Integer	min: `0`, max: `65535`	No
hello_interval	Integer	min: `1`, max: `65535`	No
network	Choice	`none`, `p2p`, `bcast`	No
passive_interface	Boolean	`true`, `false`	No
priority	Integer	min: `0`, max: `255`	No
instance_id	Integer	min: `0`, max: `255`	No
mtu_ignore	Boolean	`true`, `false`	No
retransmit_interval	Integer	min: `1`, max: `65535`	No
transmit_delay	Integer	min: `1`, max: `450`	No

areas (nxos.devices.configuration.routing.ospfv3_processes)

Name	Type	Constraint	Mandatory
id	String		Yes
type	Choice	`regular`, `stub`, `nssa`	No
redistribute	Boolean	`true`, `false`	No
nssa_translate_type7	Choice	`always`, `candidate`, `never`	No
summary	Boolean	`true`, `false`	No
nssa_translate_type7_suppress_fa	Boolean	`true`, `false`	No

address_families (nxos.devices.configuration.routing.ospfv3_processes)

Name	Type	Constraint	Mandatory
address_family	Choice	`ipv6-unicast`	Yes
distance	Integer	min: `1`, max: `255`	No
default_metric	Integer	min: `0`, max: `16777214`	No
default_route_nssa_abr_pbit_clear	Boolean	`true`, `false`	No
maximum_paths	Integer	min: `1`, max: `64`	No

vrfs (nxos.devices.configuration.routing.ospfv3_processes)

Name	Type	Constraint	Mandatory
vrf	String		Yes
shutdown	Boolean	`true`, `false`	No
auto_cost_reference_bandwidth	Integer	min: `0`, max: `4294967295`	No
auto_cost_reference_bandwidth_unit	Choice	`mbps`, `gbps`	No
router_id	String		No
bfd	Boolean	`true`, `false`	No
log_adjacency_changes	Choice	`none`, `brief`, `detail`	No
discard_route_external	Boolean	`true`, `false`	No
discard_route_internal	Boolean	`true`, `false`	No
name_lookup	Boolean	`true`, `false`	No
passive_interface_default	Boolean	`true`, `false`	No
areas	List	`[areas]`	No
address_families	List	`[address_families]`	No

Examples

Example 1: Basic OSPFv3 underlay for IPv6 fabric routing

nxos:
  devices:
    - name: LEAF1
      configuration:
        routing:
          ospfv3_processes:
            - name: "1"
              router_id: 10.1.100.3
              bfd: true
              log_adjacency_changes: detail
              areas:
                - id: 0.0.0.0
        interfaces:
          loopbacks:
            - id: 0
              ospfv3:
                process: "1"
                area: 0.0.0.0
          ethernets:
            - id: 1/1
              ospfv3:
                process: "1"
                area: 0.0.0.0
                network: p2p
            - id: 1/2
              ospfv3:
                process: "1"
                area: 0.0.0.0
                network: p2p

Example 2: OSPFv3 with address-family settings, NSSA area, and tuned timers

nxos:
  devices:
    - name: BORDER-LEAF1
      configuration:
        routing:
          ospfv3_processes:
            - name: "1"
              router_id: 10.1.100.3
              log_adjacency_changes: brief
              auto_cost_reference_bandwidth: 100
              auto_cost_reference_bandwidth_unit: gbps
              address_families:
                - address_family: ipv6-unicast
                  maximum_paths: 8
                  default_metric: 100
              areas:
                - id: 0.0.0.0
                - id: 0.0.0.10
                  type: nssa
                  nssa_translate_type7: always
        interfaces:
          ethernets:
            - id: 1/1
              ospfv3:
                process: "1"
                area: 0.0.0.0
                network: p2p
                hello_interval: 3
                dead_interval: 12
            - id: 1/10
              ospfv3:
                process: "1"
                area: 0.0.0.10
                cost: 100

Example 3: OSPFv3 in a tenant VRF with passive interfaces

nxos:
  devices:
    - name: LEAF2
      configuration:
        routing:
          ospfv3_processes:
            - name: "1"
              router_id: 10.1.100.4
              areas:
                - id: 0.0.0.0
            - name: "100"
              vrfs:
                - vrf: BLUE
                  router_id: 10.1.100.4
                  passive_interface_default: true
                  areas:
                    - id: 0.0.0.0
                  address_families:
                    - address_family: ipv6-unicast
                      maximum_paths: 4
        interfaces:
          vlans:
            - id: 1010
              vrf: BLUE
              ospfv3:
                process: "100"
                area: 0.0.0.0
                passive_interface: disabled